( Reaffirmed 1999 )

Indian Standard

AUTOMOTIVEVEHICLESREARVIEWMIRRORS-SPECIFICATION

UDC

629-113*018-l

a BIS 1994

BUREAU
MANAK

OF
BHAVAN,

INDIAN
9 BAHADUR DELHI

STAN'DARDS
SHAH 110002 Crice Group 7 ZAFAR MARG

NEW

September

1994

Automotive

Accessories

and Garage Equipment

Sectional Committee,

TED 9

FOREWORD This Indian Standard was adopted by the Bureau of Indian Standards, after the draft finalized by the Automotive Accessories and Garage Equipment Sectional Committee, had been approved by the Transport Engineering Division Council. Rear view mirrors are essential safety fitment on all types of vehicles - two wheelers, four wheelers and above all over the world. Mirrors fitted outside the vehicle to view the under carriage body of ,the vehicle are also covered in this standard. In the preparation publications: of this standard considerable assistance has been taken from the following

EEC Directive No. 71/127/EEC `Rear view mirrors of motor vehicles' EEC Directive No. 79/795/EEC `Rear view mirrors of motor vehicles' EEC Directive No. 80/780 `Rear view mirrors for two-wheeled motor vehicles with or without a side car and to their fitting on such vehicles' ECE R 46 `Uniform provisions concerning the approval of rear view mirrors, and of motor vehicles with regard to the installation of rear view mirrors' ECE R 81 &Uniform provisions concerning the approval of rear view mirrors of two wheeled power driven vehicles with or without side car, with regard to mounting of rear-view mirrors on handle bar' .JISD 5705-1987 `Mirrors for automobiles', issued by Japanese Industrial Standard. SS No. 8/1986 `Rear view mirrors for cars, trucks and buses' issued by Automotive Research Association of India.
mandatory

Rear view mirror being a safety item has also been included fitment for all motor vehicles. responsible for the preparation

under

Central

Motor

Vehicle

Rules,

as

The Committee

of this standard is given in Annex B.

For the purpose of deciding, whether a particular requirement of this standard is complied with, the final value, observed or calculated, expressing the result of a test, shall be rounded off in accordance with IS 2 : 1960 GRules for rounding off numerical values ( revised )`. The number of significant places retained in the rounded off value should be the same as that of the specified value in this standard.

IS 14210 : 1994

Indian Standard

AUTOMOTIVEVEHICLES SPECIFICATION REARVIEWMIRRORS1 SCOPE This Indian Standard specifies the requirements for internal and external rear view mirrors used in road vehicles like cars, trucks, buses, scooters and motorcycles. 2 REFERENCES Indian Standards are necessary adjuncts to this standard: Title IS No.
2500 2.1 The following

3.10 `Interior rear view mirror' means a device defined in 3.9, which can be fitted in the passenger compartment of a vehicle (class 1). 3.11 `Exterior rearview mirror' means a device defined in 3.9, mounted on the external surface of vehicle (class 2 and 3 for vehicles other than two and three wheelers, class 4 for two and three wheelers). 3.12 `r' means the mean of the radii of curvature. measured over the reflecting surface in accordance with 6.7. 3.13 The principal radii of curvature at one point on the reflecting surface `(rpl)' means the values obtained with the apparatus defined in 6.7, measured on the arc of the reflecting surface passing through the centre of the mirror parallel to the segment b (see 4.4.2-l) and on Ihe arc perpendicular to this segment, rp2 and rp3 are Ihe radii of curvature measured at the second and third points on the reflecting surface. 3.14The radius of curvature is equal to the arithmetical average of the principal radii of curvature rpl, rp2 and rp3 (see Fig. 2). 3.14.1 The radius of curvature shall be calculated from the following formula: rpl +rp2+rp3 r= 3 where r is the radius of curvature in millimetres. 3.15 `Centre of the mirror' means the centroid of the visible area of the reflecting surface. 3.16 `The radius of curvature' of the constituent parts of the rear view mirror is the radius `c' of the arc of the circle which most closely approximates to the curved form of the part in question. 3.17 `Outside under mirror'is a mirror installed outside the car room and used for viewing and perceiving the lower part and the circumference of the car. Furthermore, it includes the side under mirror tn be anached to a large truck and the like. 4 GENERAL REQUIREMENTS

(Part 1) : 1992

Sampling inspection procedures : Part 1 Attribute sampling plans indexed by acceptable quality level (AQL) for lot-to-lot inspection Basic environmental testing procedures for electronic and electrical Part 8 Vibration items : (sinusoidal) test Severities for environmental tests for automotive electrical equipme nt

9000 (Part 8) : 1981

10250 : 19X2

3 DEFINITIONS 3.1 `Mirrors' means any device consisting of a mirror, holder, adjusiing part, support (including a impact protection mechanism), etc (see Fig. 1). 3.2 `Holder' means a part holding a mirror. 3.3 `Adjusting part' means a part adjusting the angle of a mirror. 3.4 `Support' means a part existing between a mirror, a holder and a car body and supporting the mirror at a specific position. 3.5 `Impact protection mechanism' means a mechanism preventing or lightening the hindrance on a crew member and a walker by dislocation, falling down, etc of a mirror in cases of collision, contact, etc, of a human body with the mirror. 3.6 `Flat mirror means a mirror having a flat surface. 3.7 `Convex mirror means mirror having a convex surface with a definite radius of curvature. 3.8 `Reflectance variable mirror' means a mirror having a anti glare property capable of decreasing the reflectance when light of the head lamp of a following car is bright at night or in other cases. Prism mirrors are also included therein. 3.9 `Rear view mirror' means any device intended to give within the field of vision as stipulated a clear view to the rear excluding complex optical systerhs such as periscopes. 1

4.1 Every rear view mirror shall be adjustable. 4.2 The edge of the reflecting surface shall be enclosed in a holder which, on its perimeter, shall have a value `c' equal to or greater than 2.5 mm at all points and in ail directions. If the reflecting surface projects beyond the holder, the radius of curvature `c'of the edge of the projecting part shall be not less than 2.5 mm and shall return into the holder under a force of 50 N applied to the point of greatest projection, relative to the holder in a horizontal direction approximately parallel to the lorigitudinal median plane of the vehicle.

IMPACT PROTECTION

IS 14210 : 1994

MECHANISM

INTERIOR MIRROR
MIRROR f-

IMPACT

MECHANISM

RROR

EXTERklR MIRROR
ADJUSTING

PFQRT

MIRRO

OUTSIDE UNDER MIRROR
FIG.1 TYPK.A~. SIINI: OFRI:AKVII:W MIHHOH 2

IS 14210:

1994

NOTE -Pl,IZ

and 1'3 indkxtcs the measuring points.

FIG. 2 MEASURING P~WIONFOR RADIUS OF CURVATURE OFCONVEX SURFACE MIRROR 4.3 When the rear view mirror is mounted on a plane surface, all its parts, irrespective of the adjustment position of the device, including those parts remaining attached to the holder after the test set outt in 6.4, which are in potential static contact with a sphere either 165 mm in diameter, in the case of interior tear view mirrors, or 100 mm in diameter, in the case of an extetrior rear view mirrors, shall have a radius of curvature `c' of not less than 2.5 mm. 4.3.1 Edges of fiixing holes or recesses, which are less than 12 mm iin width are exempt from the radius requireents of 4.3 provided that they are blunted. 4.4 Dimensions iJ.4.1 Interior Rear view Mirrors (Class 1) The dimensions of the reflecting surface shall be such that it is possible to inscribe there on a rectangle one side of which is 4 cm and the other `u' cm in length, where l7= 15 _ 1000Cms 1+r mm.
NOTE - `Ihe value of r shall be in millimetres.

-

a rectangle 4 cm high the base length of which, measured in centimetres, has the value `u'; a segment which is parallel to the height of the rectangle and the length of which, expressed in centimeters, has the value `0'.

4.4.2.2 The minimum values of `II' and `b'are given in the table below: Class of Rear view Mirror 2 17 1 + 1000 r 13 1000 l+r 20

3

7

4.4.3 Exterior Rear view Mirror (Class 4) 4.4.3.1 The dimensions of the reflecting surface shall be such that: in the case of circular rear view mirrors, the diameter of the reflecting surface shall be between 90 and 150 mm; 3

NOTE

- The value of r shall be in

4.4.2 Exterior Rear View Mirrors (Classes 2 and 3) 4.4.2.1 The dimensions of the reflecting surface shall be such that it is possible to inscribe therein:

IS 14210 : 1994 in the case of non circular reat view mirrors, it is possible to inscribe a circle of at least 80 mm in diameter between the outside edges of the reflecting surface. This reflecting surface shall fit into a square of 150 mm side. 6.2 Classification
6.2.1 Type Tests of Tests

The following shall constitute type tests:

4.5 The value of `r'shall be: not less 1800 mm for Class 2 rearview mirrors, not less than 1 200 mm for class 1 and 3 rear view mirrors, not less than 800 mm or not more than 1 500 mm for class 4 mirrors. 4.6 Reflecting Surface - General
Requirements 4.6.1 The reflecting surface of rear view mirror shall be either flat or spherically convex. 4.6.2 Differences between the radii of curvature.

Impact test (6.4) Bending test (6.5) Distortion factor test (6.6) Test for radius of curvature of convex surface mirror (6.7) f3) Vibration test (6.8) h) Moisture resistance test (6.9) j) Temperature resistance test (6.10) k) Weather resistance (6.11).
6.2.1.1 Criteria for approval

a) b) 4 4 e) 9

General requirements

(4)

Coefficient of reflection (6.3)

4.6.2.1 The difference betweenrpl, rp2and rp3 ateach of their reference point shall not exceed 0.15 r. 4.6.2.2 When r is not less than 3 000 mm, the value of 0.15 r (see 4.6.2.1) is replaced by 0.25 r. 4.6.3 For anti-glare treated surface of a mirror, the glossiness [Gs (20")] shall not be mote than 40 percent and shall be mu,tually agreed between the purchaserand the supplier. 4.6.4 When the reflecting coating film and backing of a mirror is dipped in warm water at 90°C for one hour and then left standing in air for 10 minutes, there shall not occur cloudiness or spots on the mirror surface, ot softening or peeling of the backing. 4.6.5 All rear view mirrors shall be examined visually for hartnful defects. 4.6.5.1 There shall be no cracks. cloudiness, on the mirror surface. spots, etr,

Tensamplesshall be submitted fortesting togetherwith the relevant data. After the tests, the testing authority shall issue a type approval certificate if the brake hoses are found to comply with the requirements of trsts given in 6.1.1. In case of failure in one or mote tests the testing authority may, at its discretion, call for fresh samples not exceeding twice the number of original samples and subject them to test(s) in which failure occurred. If in repeat test(s) no failure occurs, the test(s) may be considered to have been satisfied. 6.2.2 Acceptance Test The following shall constitute acceptance a) b) c) d) tests: General requirements (4) Coefficient of reflection (6.3). Distortion factor test (6.6), and Test for radius of curvature of convex surface mirror (6.7).

4.6.5.2 The rubber parts shall be free from fissure, crack and other harmful defects, 5 SAMPLING Unless otherwise agreed to between the purchaser and the supplier, rear view mirros shall be selceted at random from the lot offered for acceptance as pet IS 2500 (Part 1) : 1992. 6 TESTS
6.1 Test Atmosphere The test room shall be room temperature

6.2.2.1 All the rear view mirrors selected from the lot offered for acceptance as specified in 5, shall comply with the requirements of the tests given in 6.2.2. 6.3 Coeffkients
of Reflection 6.3.1 .The apparatus shall consist of a light source, a sample holder for the test sample, a receiver unit with a photodetector and an indicating meter (see Fig. 3 ), and means for neglecting the effects of extraneous light. The receiver may incorporate a light integrating sphere to facilitate measuring reflectance of non-flat (convex) mirrors (see Fig. 4).

20 2 20°C and relative humidity 65 2 20 percent. 6.1.1 The following tests shall be carried out on the minors:

a>Coefficient
b)
Cl 4

of reflection;

6.3.2 Spectral Receiver

Characteristic

of Light Source

ana'

e>

9 g) h) 8

Impact test: Bending test; Distortion factor; Radius of curvature of convex surface mirror; Vibration; Moisture resistance; Temperature resistance test; and Weather resistance, 4

The light source shall consist of an incandescent tungsten filament lamp operating at a nominal colour temperature of 2 856 K (CIE Illuminant A), and associated optics to provide a near collimated light beam. Avoltage stabilizer is recommended for maintaining a fixed lamp voltage during instrument operation. The receiver shall have a photodetector with a spectral response proportional to the photopic luminosity functions of the standard CIE observer. Any other

IS 14210: 1994

combination of illuminant-filter-recepter which giving the overall equivalent of illuminant A and average visual response may be used. When an integrating sphere is used in the receiver, the interior surface of the sphere shall be coated with a matt (diffusive), spectrally non-selective white coating. 6.3.3 Geometric Conditions The angle of the incident beam (Cl)shall preferably be 0.44 2 0.09 radians (25 + So) and shall not exceed 0.53 rad (30°) from the perpendicular to the test surface. The axis of the receptor shall make an angle (Cl) with this perpendicular equal to that of the incident beam (see Fig.
3). The incident beam upon arrival at the test surface shall have a diameter of not less than 19 mm. The reflected

The phokxleteck~ output as read on the indicating meter shall be a linear function of the light intensity on

the photosensitive area. Means (electrical and/or optical) shall be provided to facilitate zeroing and calibration adjustments. Such means shall not affect the linearity or the spectral characteristics OT the instrument. The accuracy of receptor-indicator unit shall be within 2 2 percent of the full scale, or * 10 percent of the magnitude of the reading, whichever is smaller. 6.3.6 Sample Holder The mechanism shall be capable of locating sample such that the axes of the source arm and intersect at the reflecting surface. The reflecting may lie within or at either face of the mirror depending upon whether it is a first-surface, surface or prismatic `flip' type mirror. 6.3.7 Direct Calibration Method In the direct calibration method, air is used as the reference standard. This method is for those instruments which are so constructed as to permit calibration at the 100 percent point by swinging the receiver to a position dirertly on the axis of the light source (see Fig. 3). It may be desired in some cases (such as when measuring low reflectivity surfaces) to use an intermediate calibration point (between 0 and 100 percent on the scale) with this method. In such case, a neutral density filter of known transmittance shall be inserted in the the test receptor surface sample, second-

beam shall not be more than the sensitive area of the photodetector, shall not cover less than 50 percent of such area, and as nearly as possible shall cover the same area segment used during instrument calibration. 6.3.4 When an integrating sphere is used in the receiver section, the sphere shall have a minimum diameter of 127 IIU~. The sample and incident beam apertures in the sphere wall shall be of such a size as to admit the entire incident and reflected light beams. The photodetector shall be so located as not to receive direct light from either the incident or the reflected beams. 6.3.5 Electrical Intlicutor Unct Charrrcteristics of the Photodetector

.._.. _

INDICATOR

ZERO ADJUSTMENT

DIAL REFLECTANCE RECEPTOR

DIAL

RECEPTOR [POSITION IN MESUREMENT OF REFLECTED LIGHT)

8i=

Br = 25'f

5'

-.___.r

Rci. 3 D~RI<UMEASCRINC~ MFTHOI) 01, F&l

tClAN(`F,

(EXAMPLE)

IS 14210 : 1994 optical path, and the calibration control shall then be adjusted until the meter reads the percentage transmission of the neutral density filter. This filter shall be removed before making reflectivity measurements. 6.3.8 Indirect Calibration Merlrocl The indirect calibration method is for those instruments with fixed source and receiver gcomctry. A properly calibrated and maintained rcflcctancc standard is required. This reference standard should preferably be a flat mirror with a reflectance value as near as possible to that of the test samples. 6.3.9 Flat Mirrors Measurement The reflectance of flat mirror samples is measured on instruments which employ either the direct or indirect calibration method. The reflectance value is read directly from the indicating meter. 6.3.lU Non-flat (Convex) Mirror Measurement Reflectance of non-flat (convex) mirrors measurement requires the use of instruments which incorporate an integrating sphere in the receiver unit (see Fig. 4). If the instrument indicating meter indicates n, divisions with a reference standard mirror of E% reflectance, then, with a mirror of unknown reflectance, n, division will correspond IO 21reflrc,lancc of X% in accordance with formula:
X%=E.:

e

6.3.11 The value of the normal coefficient of reflection, as determined according to the method described above shall be not less than 35 percent. However, for a reflectance variable mirror, the reflectance on the low reflectance side shall be not less than 4 percent. 6.4 Impact Test 6.4.1 Est Rig
The test rig consists of a pendulum

capable of swinging about two horizontal axes at right angles to each other, one of which is perpendicular to the plane containing the `release' trajectory of the pendulum. The end of the pendulum comprises a hammer formed by a rigid sphere with a diameter of 165 -c 1 mm and having a 5 mm thick rubber covering of Shore hardness A 50. A device is provided which permits determination of the maximum angle assumed by the arm in the plane of release. A support firmly fixed to the structure of the pendulum serves to hold the specimens in compliance with the impact requirements specified in 6.4.7. Figure SAgives the dimensions of the test rig and the special design specifications. Figure 5B and 5C gives the inlpact test of the rear view mirrors.

INDICATOR

DIAL

INTEGRATING

MIRROR 0=25O* so

AND

HOLDER

FK; 4 INIXUKT ME,NNNG METHOD C)F REFLKIANCE (EXAMPLE)
6

IS14210:1994

i

I

L

1200

I

-

-4

600

r

All dimensions in millimetres.

FIG.SA IMPACT TESTDEVICE The centre of percussion of the pendulum shall coincide with the centre of the of sphere from the hammer. It is at a distance `I' from the axis of oscillation in the release plane which is equal to 1 m + 10 mm. The reduced mass of the pendulum to its centre of percussion is VI, = 6.8 2 0.05 kg. [The relationship between the centre of gravity of the pendulum and its axis of rotation d is expressed in the equation m, = m I ( 6.4.2 Test Description manufacturer. 6.4.3 Positioning of the Rear View Mirror for the Test 6.4.3.1 Rear view mirrors shall be so positioned on the pendulum impact rig such that the axes which are horizontal and vertical when the rear view mirror is installed on a vehicle in accordance with the purchaser's mounting instructions, are ina similarposition. 6.4.3.2 respect which within chaser. When a rear view mirror is adjustable with to the base, the test position shall be that in any pivoting device is least likely to operate, the limits of adjustment provided by the pur-

)I

The procedure used to clamp the rearview mirror to the support shall be that recommended by the manufacturer of the device, or, where appropriate, by the vehicle 7

1s 14210: 1994

m -1.__
HAMMER

/

,

STA ND

SURFACE

OF

\ROTARY AXIS OF IMPACT PROTECTION MECHANISM

Rti 5B SHOCK TYPE IMPACTTESTOF INSIDEMIRROR

PARALLEL LINE

TO

OF VEHICLE

( PROJECTION

DRAWING

ON HORIZONTAL

PLANE)

FIG 5C SHOCK TYPE IMPACT TESTOF OWISIDE MIRROR
6.4.3.3 When the rear view mirror has a device for

adjusting its distance from the base, the device shall be set in the position in which the distance between the holder and the base is least. 6.4.3.4 When the rellecting surface is mobile in the holder. it shall be so adjusted that the upper corner which is furthest from the vehiclc is in the position of greatest projectttm relative to the holder. 6.4.4 Exctp~ 111the case of test 2 for interior rear view mirror 1~ec'6.4.7(a)] when the pendulum is in a vertical

position, the horizontal and longitudinal vertical planes passing through the centre of the hammer shall pass through the centre of the mirror. The longitudinal direction of oscillation of the pendulum shall be parallel to the longitudinal plane of the vehicle. 6.4.5 When under the conditions governing adjustment laid down in 6.4.3.1 and 6.4.3.2 parts of the rear view mirror limit the return of the hammer, the point of impact shall be displaced in a direction perpendicular to the axis of rotation or pivot in question. This displacement shall be no greater than is strictly necessary

x

IS 14210 : 1994

for the execution of the test; it shall be hmited in such a way that: either the sphere delimiting the hammer remains at least tangential to the cylinder; and or the point of contact with the hammer is located at least IO mm from the periphery of the retlccting surface. 6.4.6 The test consists in allowing the hammer to fall from a height corresponding to a pendulum angle of 60° from the vrrtical so that the hammer strikes the rear view mirror at the moment when the pendulum reaches the vertical position. 6.4.7 The rear view mirrors are subjected urider the following different conditions: a)
Interior rear view mirrors Tosf 1 - The point of impact shall be as deIlned

the hammer strikes the rear view mirror on the opposite side to the reflecting surface. 6.4.8 In the tests described in 6.4.1 to 6.4.7, the pendulum shall continue to swing after impact in such a way that the projection of the position assumed by the arm on the plane of release makes an angle of at least 20° with the vertical. The accuracy within 2 1". of measurement of the angle shall be

to impact

in 6.4.4. Thr impact shall be such that the hammer strikes the rear view mirror on the rcllccting surl;lce side [ .seeFig. 5B and 5Cl.
Td 2 - Point ol impact od the cdgc of the holder. 40 I~;II the impact produced lliakea iI11 angle 01~45" with the plane of the mirror and is

6.4.9 The test described in 6.4.1 to 6.4.7 shall not be required for exterior view mirrors of which no part is less than 2 m from ground, whatever the adjustment position may be, when the vehicle is under the load corresponding to its maximum technically possible weight. In this case, the manufacturer shall provide a description stipulating that the rear view mirrorshall be mounted in such a way that none of its parts, in any of the possible adjustment positiorls, is less than 2 m above the ground when the vehicle is under the load corresponding to its maximum technically permissible weight. 6.4.10 Altcrnatc
Icjr inlpct 6.5 ilending
6.51

method lbr testing rear view teal ha.\ hccn given in Annex A.
Test

mirrors

aituatcd in the hori-/ontal planr passing through the ccntre 01 the mirror. The impact shall occur on the reflecting surface side. h)
Exlcrior rear view mirrors Tesf I -The point of impact shall be as defined in 6.4.4 or 6.4.5. The impact shall be such that

the hammer strikes the rear view mirror on the rcllecting surface side. 7;,.~ 2 - The point of impact shall bc as defined in 6.4.4 or 6.4.5. The impact shall be such that

The holder is placed horizontally in a device in such a way that the all movable parts of the mounting may be clamped securely. In the direction of the greatest dimensions of the holder, the end nearest to the point of fixing on the adjustment part shall be immobilized by means of a fixed stop 15 mm wide covering the entire width of the holder. At the other end, a stop identical to the one described above shall be placed on the holder so that the specified trst load can be applied to it (Fig. 6).
ADJUSTABLE STOP /--

METAL BLOCKS HOLDER

/

r

/

1

4 WEIGHT P

I/

ADJUSTABLE SUPPORT

IFIG 6 BENDING TESTAPPARAKS 9

STEM CLAMPING MECHANISM FORREARVIEWMIRROR

IS 14210 : 1994 The end of the holder opposite that at which the force is applied may be clamped (instead of simply blocked) as shown in Fig. 6. The test load is 25 kg. It is applied for one minute. 6.5.2. The mirror shall not break during the test. However, breakage of the mirror may be allowed if any one of the following conditions is fulfilled. The fragments of glass still adhere to the back of the holder or to a surface firmly attached to the holder. Partial separation of the glass from its backing is admissible, provided this does not exceed 2.5 mm on either side of the crack. It is permissible for small splinters lo become detached from the surface of the glass at the point of impact. 6.6 Distortion
The distorlion ilS follows.

the octasectional lines passing through its drawn, are rightly opposed to each other at of 300 mm in front of the mirror as given in the image of the concentric circular scale of surface that can be photographed through hole of the scale of the screen, is used.

centre are a distance Fig. 7 and the mirror the centre

An equivalent method (for example, using a projector) may also be used. In addition, when the longitudinal distortion factor is necessarily measured with the mirror of a large crosswise ratio, the distortion factor shall be measured so that the concentric circle scale is thoroughly included by parallel transfer of the mirror surface for the flat surface mirror and by shifting the position of the mirror along the circle of the radius of curvature by the method explained in Fig. 8 for the convex surface mirror. 6.6.2 Ctrlcrrkrtion
The dislorlion factor shall be calculated lowing fkuiula: from the fol-

Factor Test
factor test of a mirror shall be carried out

6.6.1 Thr apparatus in which lhr concentric circular scale of 10 IIIIU inscale iutcrvaI aud the screen on which

:N

REFLECTED IMAGE OF CONCENTRIC SCALE

'

\

.A_

t8

_R

/-

el CONCENTRIC ON SCREEN (GRADUATED IN

SCALE 10
mm)

~`o~tinuous line - retlected image of scale on screen of& Oh',, - largest radius of distortion. Dotted line - concentric scale on screen.

in HOtime.

Explanatory drawing of nth retlected image (Example).

FIG. 7 APPARATUS FOR DISTORXON FACKIRTEST(EXAMPLE)

IS 14210 : 1994

UOR

-ITION OF MIRROR SHIFTED FOR MEASURErvlENT OF MIRROR FIG. S TEW MI: IFIOI) WK MIKKOK 0); A b.KCiE R -R E=_X 100 where disortion factor in percentage;
r=

Ct<ossww RATIO OK THELIKE
500 y=---x

K,
where E= %= aveiage radius of the reflected imagee of the uth concentric circle calculated from the following formula (mm): R = 0' a' n + 0' b' II + ,,............ o' h' n n 8 where
0' a' n, 0' b' n...

x radius

2

of curvature (radius of mirror surface); and

x = readin

of dial gauge (value of PH in Fig. 9) ? 1000 = 31.62

6.7.3 Crrlcdution The radius of curvature shall be calculated formula given in 3.14.1. from the

0' h' n = Radius of each circle of the nth reflectted itnage (mm). R, = radius of the largest or smallest reflected image (mm). 6.6.3 After the test, the distortiou factor of the mirror surface shall not be more than 2 percent for a flat surface mirror and not more than 5 percent for a convex surface mirror. However, the distortion factor of a convex surface mirror of outside uuder mirror shall be not more than S percent. 6.7 Test for Radius of (hrvature Mirror of Convex Surface

6.7.4 The radius of curvature shall be as specified in 5. However, the radius of curvature of an outside under mirror shall IX not less than 100 nuu. 6.8 Vihratioa Test 6.8.1 This test is intended to detrrmine the ability of rear view mirror to withstand specified severities of vibration when mounted on a vehicle. 6.8.2 The test shall be carried out as spccificd in IS 9000 (Part S) : 1983 with the following scvcrities: 10toSOHz Frequency range 0.75 llllll Displacement amplitude Three hours Total duration 6.8.3 After the test, deformation, breakage and falling down of any part, the displacement in the direction of the mirror, and other harmful defects shall not be generated. The rear view mirror shall comply with the reflectance requirement as specified in 6.3.11. 6.9 Moisture Resistance Test (for Exterior Mirrors Only) As to the moisture resistance test of a mirror, the mirror in a normal service state is installed, the test shall be carried out to investigate the perfonnauce of the mirror subjected to humidity in the atmosphere of air, water vapour aud droplet mixture for one hour. The water temperature shall be approximately 60°C. Afterthe test, the presence of defects in each part of the mirror and the reflectance of the mirror bc rxamiucd. II

6.7.1 The test for the radius of curvature of a convex surface mirror shall be carried out by the method ;Iud with the test apparatus specified. The radius of curvature shall he obtained by calculation. 6.7.2 The radius of curvature is uieasured at positions of l/3, l/2 and 2/3 on the circular arc in the longitudinal direction passing through the centre of the mirror as given in Fig. 2 with the spherometer or the measuring ilLstrument having the performance equal or superior thereto Toorthe measuring apparatus as giveu in Fig. 9. However, as to an outside uuder mirror, the measurement of only the centre of the mirror may be carried out. NOTE - (klculation formula for measurement of radius of Curvature (Example in the case of AH = m mm)

IS 14210:

1994

DIAL

All dimensions

In

mllllmetres.

After the test, each part shall hc free front dcfccts and the rctlcctanrc of the mirror after test shall hc not less than X5 percent relative to the reflectance before test. 6.10 `L'eniper~ture
Resista~~rr Test

After the test, cloudiness and anv deterioration of the nlirror surface such as disc,olouraiion, cracks, deformation ofothcr parts shall not be present. 7 I)ESIGNA'I'ION Designation of rear view mirror shall comprise following information: Product - Class - 1S number of the

The mirror is installed in the normal service state and placed in an air oven. The cooling and heating rcpcti(ion test one cycle of which consists of a high tempcratureofXO"C foran inside mirrorand 79"Cforanoutside mirror and for an outside under mirror, one hour at room temperature for 30 min, and a low temperature of -30°C for one hour, and again at room temperature for 30 rnin is carried out two times. The presence ofdefects in each part of the mirror shall then be examined. After the test, deformation, cracks. and other harmful ahnornlalities shall not be generated in any part. 6.11 Weather
Only) Resistance Test (for Exterior Mirrors

For example, rear view mirror of class 2 shall be designated as: R V2 IS 14210 8 I'ACKING Each rear view mirror shall be suitably packed to avoid any damage during storage/transportation as per agreement between the manufacturer and the purchaser. 9 MARKING 9.1 Each rear view mirror shall be legibly and indelibly marked with the following: a) b) c) d) Manufacturer's name or trade-mark, Designation; Batch number; and Month / Year of manufacture.
if any;

The weather resistance test of an outside mirror and an outside under mirror shall be carried out for 300 h with the sunshine carbon weather meter. The presence of defects in each part of the mirror shall be examined. Further, when the test is carried out, the specimen may be fitted by dividing it.

12

IS 14210 : 1994 9.2 RIS Certification Marking
and the Rules and Regulations made thereunder. The details of conditions under which the licence for the use of Standard Mark tnay be granted to tttanufacturers or producers may be obtained from the Bureau of Indian

The product tnay also be marked with tbc Standard Mark. 9.2.1 The use of the Standard Mark is governed by the

provisions

of the Bureau of Indian Standards Act, 1986

Standards,

ANNEX A ( Clause 6.4.10 )
AIATERNATE METHOD FOR IMPACT TEST A-l IMPAC'T TESI A-l.1 Test Conditions
When the tttirror is Installed ax in nortttal use statr, an tttsidc mirror shall conform to the performance spccifted in A-1.1.1 and an outside tttirror shall conIrm to the pcrfortnancc specified in A-1.1.2. However. this provision is ttot applied to the following mirrors: a) b) The
IIISI~P

iv) The

tttirror

on the bodyside tttechanisttt Mirror

of which is provided.

an

impact protection

A-1 .l .l Impct

Tar jiw Insidr

An itaide tttirror shall be installed statr and forward forcr IS applied

in a normal service tn all the directions

mirror

which

is outside

the head

shock range of a crew-member. The following mirror i) Thr II) The outside tttirror and outside under inside the most exterior ofover

within 45" to both horl/ontal and vertical directions passing through rhc Rena of the adjusting tttechattism of the mirror as given in Fig. 10. OIhctwisr. force is applied by using a sphere or hetttisphere head tttodel of 165 mttt in diattterer, having a sufficient hardness towards the front frottt the dirrctiott of within 45" both hori7otttal and vertical direrliom passing through the centre poittt on the tttirror surface, as shown in Fig. 11. The tttaximum force applied for the itttpact test shall bc 440 N (45 kgf). The mirror shall be displaced outside the hcah sh& range or otherwise all ihe sharp ends may be retttoved or be broken before test.

:
tttirror inslallrd mtrror

line of the car body,

1.X III
tti) Mtrrclr

tnstalled a( a position of ground clearance. for two-wheeled vehicles,

and

DIRECTION OF
DIRECTION PROGRESS OF OF

I_MIRROR
Projection Drawing on Vertical Plane Projection Drawing on Horizontal Plane

FIG.10 PRESS TYPEIMPACT PRO-EXXON TFSTOFINSIDE MIRROR (ADJUSTING MECHANISM PRESS METHOD) 13

MIRROR

DIRECTION OF PROGRESS OF

DIRECTION OF PROGRESS OF VEHICLE

Projection Drawing on Vertical Plane

Projection Drawing on Horizontal Plane

FIG. 11 PRESS TYPE IMPA~ PR~TKTION Asrun TJZSTOF INSIDE MIRROR (MIRROR CENTRE PRESS MEIHOD)
A-1.1.2 Impact Test for Outside Mirror The outside

mirror is installed in a normal service condition. Any one of the following tests shall bc carried out : a) The rearward force parallel to the centre line of a vehicle is applied to the mirrorby touching the cylindrical body of 165 mm in diameter, having sufficient hardness to the most exterior line of the vehicle near the fitting thereof as given in Fig. 12. The rearward force parallel to the centre line of' b) the vehicle is applied to the mirror along the line of 1.8 111inground clearancewiththe cylindrical body of 165 mm in diameter, havinga sufficient hardness as given in Fig. 13. The rearward force parallel to the centre line of Cl the circle is applied to the centre of the adjusting mechanism of the mirror as given in Fig. 14. However, the rearward force parallel to the centre line of the vehicle may be applied to am part of the mirror projected from the most clterior line of the vehicle when the centre of thr adjusting mechanism of the mirror is inside the most exterior line of the vehicle near the fitting of the mirror, and otherwise to any part of the mirror located at a position of maximum I .X III, when the centre of the adjusting mechanism of' the mirror exceeds 1.8 m in ground clearance.
A-1.1.3 The impact test of outside mirror shall conform

near the fitting part of the mirror or otherwise to be at a position of higher than 1.8 m in ground clearance, otherwise the mirror may fall off. However, the angle made by the line connecting the centre of rotation of the support and the directional regulating centre of rotation of the mirror and the centrc lint of the vehicle undrr a state where it is

VEHICLE MOST EXTERIOR LINE NEAR THE FITTING OF MIRROR

_-+__

LINE

OF VEHICLE

0165 mm CYLINDRICAL
BODY

Flc;. 12 PRESS TYPE IMPACT PROTECIION Amm TEST OFOUBIDEMIRROR projected on the horizontal plane may be displaced by IO" Min from that at standard fitting time to become 40' Mnx after displacement.

to the following

requirements

:

The maximum force applied for impact test shall be 245 N (25 kgf) and the mirror shall be displaced to be inside the most exterior side line of the car body
14

IS 14210

: 1994

PROGRESS DIRECTION OF VEHICL;

ROTATION

ADJUSTING MECHANISM CENTRE OF MIRROR

TO THE

CENTRE

FORCE PARALLEL

/.6$ym

m CYLINDRICAL ABOVE THE GROUND t

ADJUSTING

MECHANISM

/

MIRROR / FIG. 13 PKWSTYW JMPAtY'l' PKOTWtlON AIWIY
TECST OF OIJXIDE MIRRORABOVE -DIEGROUND

FIG. 14 PRESS TYPE IMPACTPROTIX'IIONARttrtv TEST OF OU-IISDE MIRROR

ANNEXB (Foreword )
COMMITTEE
Automotive
Chairman SHRI R. N. Chm~ Members

COMPOSITION
TED 9

Accessories and Garage Equipments Sectional Conmittee,

Clontrollerate of Quality Assurance (Veh), Ministry Abmednagar Bajaj Auto Ltd, Pune
)

of Defence,

SHRIASHOKBAM M. MANEL ( Alkrna/e SHRIR. c. BALAKWHNAN
SHRI J. GOPALAN ( Alternate )
SHN A. B. BHAMARE SHRI V.

Ashok Leyland Ltd, Madras Centml Instituteof Road Transport, Pune J M A Industries Ltd, New Delhi
)

SHRI S. KUMAR ( Altemafe )

SHRIRAHUL KABIR BHANDARI
SHRI Kutnr~ SINGH(Alfemate

SHRIS. B. DUGAD SHRIA. B. PAWE(Alfemate
SHRI K. c;OPAlACHnW )

Bajaj Tempo Ltd, Pune Mahindra Nissan Allwyn Ltd, Hydembad Directorate of Technical Development and Production (Air), Ministry of Defence, New Del hi
)

SW S. K. GUWII
SHRI D. SHRI K. C.

GANC~PADHAYA ( A Itemate JAIN
GWTA (Alternate )

Escorts Ltd, Faridabad ( Conlinued on 15
page

SHRIR. K.

16 )

IS 14210 (
Continued

: 1994
from page IS ) Representing Ministry ) Swaraj Mazda Ltd. Chandigarh and Locomotive CQ Ltd, Pune of Defence, Ordnance Factory Board, (`alcutta

Members SHRI R. K. JAIN SHRI V. RAJARAUAN ( Alternate SHFCI A K JINLIAL MANAGER (STDZ) DEPIJTY DM (TECH SERVICES) (Alternate MAI GEN P. M. MENON SHRI K. V. RAMI REDDY
SHRI SHRI

Tata Engineering ) Kerala

State Road Transport

Corporation,

Trivandrum New Delhi

Association ) Vehicle )

of Siate Road Transport

Undertaking,

A. K. MALIK( Alternate

P. S. SAUNNAI.
SHRI R. S.

Research and Development

Establishment,

Ahmednagar

CHH~RRA ( Alternate

SHRI P. V. S~anbx~l SHRI S. S. SANDHI!
SHR, S. G. SHRI 7 SHAH

The Automotive

Research

Association

of India, Pune

( Alternde

)
Association ) Vankos and C'ompany. ) Maruti Udyng I*td, t iurgaon Patna of Indian Automobile Manufacturers, Bombay

V. SRINI~ASAN ( .4/fernafr

SIIIU V. N. SHARMA SHRI S R. PIFLAI ( Ahernaie SHRI K. C. SRWASTAVA Sinu I). K. (`HA~WLAK\

( Al/emu/c

i
I-I.(;1 Equipments <;eneral, I.td. (`oimhatore HIS (k-r-Of/icro Member) Director

SINI t.

K. SIYWAMATWAM

SHRI N. S. ~VIJAYARAC~WWA~. Director (TED)

Assistant

Dircclor

(Tranbpcrrl ICngg). l3IS

16

Bareao of Indian Standards BIS is a statutory institution established under the Bureau harmonious development of the activities of standardization, and attending to connected matters in the country. Copyright No part of these publications may be reproduced in any BIS has the copyright of all its publications. form without the prior permission in writing of BIS. This does not preclude the free use, in the course of necessary details, such as symbols and sizes, type or grade of implementing the standard, designations. Enquiries relating to copyright be addressed to the Director ( Publications ), BIS. Review of Indian Standards Amendments are issued to standards as the need arises on the basis of comments. Standards are also reviewed periodically; a standard along with amendments IS reaffirmed when such review indicates that if the review indicates that changes are needed, it is taken up for revision. no changes are needed; Users of Indian Standards should ascertain that they are in possession of the latest amendments or edition. This Indian Standard
has been developed from Dot No.

of Indian marking

Stan&r& Act, 1986 to promote and quality certification of goods

TED 9 ( 3491 ).

Amendments Amend No.

hued Date

Since Publication Text Affected

of Issue

BUREAU Headquarters: Manak Bhavan, 9 Bahadur Shah Zafar Telephones : 331 01 31, 331 13 75 Regional Central Eastern Northern Southern Western Offices : : Manak Bhavan, 9 Bahadur NEW DELHI 110002 : l/14 C. I. T. Scheme CALCUTTA 700054 : SC0 335-336, Sector

OF INDIAN

STANDARDS

Marg,

New Delhi

110002

Telegrams : Manaksanstha ( Common to all offices ) Telephone

Shah Zafar

Marg Maniktola

t 331 01 13 75 31

VII M, V. I. P. Road, 34-A, CHANDIGARH MADRAS

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